CN101582225B

CN101582225B - Flexible light emitting diode (LED) display screen

Info

Publication number: CN101582225B
Application number: CN 200810097359
Authority: CN
Inventors: 李维汉; 彭彦淳
Original assignee: LANXING OPTOELECTRONIC TECHNOLOGY CORP
Current assignee: LANXING OPTOELECTRONIC TECHNOLOGY CORP
Priority date: 2008-05-13
Filing date: 2008-05-13
Publication date: 2013-03-20
Anticipated expiration: 2028-05-13
Also published as: CN101582225A

Abstract

The invention relates to a flexible light emitting diode (LED) display screen which is realized by a method that a plurality of LED devices and conducting wires are arranged on a flexible substrate, and the LED devices and the conducting wires are electrically connected, thus, the utilization area of the flexible LED display screen can be adjusted as required, and the flexible LED display screen can be applied to application surfaces of planes or curved surfaces of different specifications as a display screen for a display board. Through the material characteristic of flexible plasticity of the flexible substrate, the flexible LED display screen can be flexibly jointed on the application surface effectively so as to improve the convenience of use and construction of the flexible LED display screen in a back gum pasting mode.

Description

Flexible light emitting diode (LED) display screen

Technical field

The present invention is relevant a kind of display device, espespecially a kind of flexible light emitting diode (LED) (Light EmittingDiode, LED) display screen.

Background technology

In that science and technology is flourishing now, Information Communication is day by day rapid, for can immediacy, reach to consumer's products Presentation whenever and wherever possible or the advertisement benefit such as publicize, now how directly to reach its effect of publicity in modes such as advertisement plate, placard, signboard or display screens, also have directly in the vehicles such as public transportation vehicle take in the compartment or car body outside, to arrange or the modes such as billboard or display screen that plaster posters become the advertising trend of Novel state; Yet, form of construction work of assembling, the setting of advertisement plate, placard, signboard or the display screen of usefulness is comparatively complicated for these, and can't bend arbitrarily and be arranged at any curved surface area with radian, so can't be certain reach whenever and wherever possible the effect of publicity with immediacy, the ad content of its non-image-type is single again, changing its content such as wish then needs all dismountings, again makes ripe economic benefit and the environmental consciousness of not meeting.

Therefore, such as TaiWan, China patent of invention I233326 number " manufacture method of flexible base plate and flexible base plate " and TaiWan, China new patent M292478 number " flexible composite board " though the flexible base plate practical use that discloses, but it only provides merely a soft sheet material, still need be connected in addition the devices such as conducting wire and control circuit and reach predetermined function.

Be with, such as TaiWan, China patent of invention I246366 number " flexible circuit board " and No. 200612787 " flexible circuit board " announcement, it is as board substrate with a flexible base plate, configuration is provided with plurality of wires on described flexible base plate, effectively reach by this electrical transmission, but it only provides merely the circuit function of an electrical control transmission and the function that provides a light source to connect and show can't be provided.

So, such as No. the 200625673rd, TaiWan, China patent of invention " the inorganic light-emitting diode display of tool flexible base plate " and I259592 number " the inorganic light-emitting diode display of tool flexible base plate ", it is on a flexible base plate one drive circuit to be set, again at least one inorganic light-emitting diode epitaxial film is engaged in the surface of this flexible base plate, and drive luminous with this driving circuit, though above-mentioned flexible base plate can provide a deflection and the flexible base plate of led light source can be provided synchronously, but its led light source that utilizes is the mode that is coated with covering is arranged at suitable place, and its manufacturing process is complicated and can't look demand and adjust arbitrarily its usable floor area.

In addition, used large-scale display board, such as TaiWan, China patent of invention I289947 number " flexible led light source structure, soft board and manufacture method thereof " exposure: a kind of flexible light source, utilize metal level routing welding on the soft board, the sticking crystalline substance of chip, eutectic bonding or flip-chip encapsulation that the light emitting diode embedding is sticked on the metal gasket, form a flexible led light source.Link light emitting diode and soft board by a metal material, use this flexible led light source soft board as large-scale display panel, but because of the lighttight shortcoming of metal material, cause on the contrary the daylighting effect significantly to reduce.And TaiWan, China patent of invention No. 369731 " with clear glass or quartzy light emitting diode and method for makings thereof as permanent substrate " discloses: with clear glass or the quartzy method for making of being used as the light emitting diode of permanent substrate, the right complicated and Expenses Cost of its manufacturing process, and can't directly adhere to LED device on the glass substrate, its actual application and construction is difficult for, and the production method Expenses Cost.

Be to propose a kind of plural LED device is directly being pasted on a flexible base plate with, the present invention, be electrically connected with the complex conduction circuit again that form a flexible light emitting diode (LED) display screen, real is original meaning of the present invention.

Summary of the invention

The object of the present invention is to provide and a kind ofly have flexual flexible base plate as a display device with one, by most LED device and plural conductive circuit are set at flexible base plate, make these LED device and conducting wire reach electrically connect, the pliability that sees through this flexible base plate makes on the curved surface or planar structure of its any size that can be applicable to have radian, size, to reach the effect of demonstration.

Another object of the present invention is to provide a kind of and can be directly the printing control circuit of control circuit board directly be printed on flexible light emitting diode (LED) display screen on the flexible base plate, the situation of hop produces when avoiding hardboard material electrically connect, and is able to adjust according to actual needs the area of this display screen.

Another purpose of the present invention is to provide a kind of can directly paste the flexible light emitting diode (LED) display screen that is arranged on various planes or the bending curved-surface structure, back glue type structure by this display screen can directly adhere to this flexible light emitting diode (LED) display screen on the various structural planes, effectively simplify and form structure and form of construction work, and according to the facts the border need to adjust the area of this display screen.

A further object of the present invention is to provide a kind of flexible characteristic by flexible base plate, and make light-permeable or lighttight flexible base plate by its material characteristic, again with the array arrangement of these light emitting diodes as display panel, by most LED device are arranged on this bendable flexible base plate, and reach applicable on the various transparent or opaque structural planes; And by the inboard that display screen is arranged at structural plane, to reach the effect of windproof, sun-proof and waterproof.

For reaching above-mentioned purpose and effect, the present invention provides the flexible base plate of a flexible material, it is the first surface with most LED device of a covering, and the mode of toasting with screen painting or coating forms the complex conduction circuit, these LED device are after being arranged on this first surface and being electrically connected with these conducting wires respectively with the array arrangement, again these conducting wires and plural control circuit are electrically connected, in order to reach electric connection, electric current firmly and the effectiveness of circuit control.

Description of drawings

Fig. 1 is the stereo appearance figure for the first embodiment of the invention display screen;

Fig. 2 is the front elevation for the first embodiment of the invention display screen;

Fig. 3 A is the front elevation for second embodiment of the invention;

Fig. 3 B is the rear view for second embodiment of the invention;

Fig. 4 is the partial enlarged drawing for second embodiment of the invention;

Fig. 5 A is to be enforcement view of the present invention;

Fig. 5 B is to implement view for of the present invention another;

Fig. 6 A is the composition synoptic diagram for embodiments of the invention;

Fig. 6 B is the diagrammatic cross-section for embodiments of the invention;

Fig. 7 is the first embodiment synoptic diagram for light emitting diode of the present invention;

Fig. 8 is the second embodiment synoptic diagram for light emitting diode of the present invention;

Fig. 9 is the 3rd embodiment synoptic diagram for light emitting diode of the present invention;

Figure 10 is the 4th embodiment synoptic diagram for light emitting diode of the present invention;

Figure 11 is to be LED device synoptic diagram of the present invention;

Figure 12 is to be conspectus of the present invention.

Drawing reference numeral

Flexible base plate 10 first display layers 101

The second display layer 102 the 3rd display layer 103

First surface 11 second surfaces 12

Conducting wire 20 conductive units 21

Insulation course 22 perforates 23

LED device 30 pedestals 31

Wiring

32,33 red light-emitting diode chip units 34

Blue LED chip unit 35 green light LED chip units 36

Single chip LED device 37 printing control circuits 40

Conductive unit 41 encapsulated layers 50

Embodiment

See also Fig. 1, it is the stereo appearance figure for the first embodiment of the invention display screen, the present invention is by a flexible base plate 10, complex conduction circuit 20 and plural LED device 30 form, wherein, this flexible base plate 10 is to can be poly terephthalic acid diethylester (PET, Poly ethylene terephthalate), polypropylene (PP, polypropylene), pi (PI, Polyimide) or acryl (PMMA, Polymethylmethacrylate) etc. the specification that forms of printing opacity or lighttight material is greater than the above substrate of 10cm * 10cm, this substrate also can be a flexible printed wiring board (FPC, Flex Printed Circuit), the base material of soft board can be PP or PET, utilize the base material of coated copper foil to make printed circuit board (PCB) (PCB) with etching mode, can produce single face, two-sided or multilayer soft board, more can embed part processing, such as LED device of the present invention, has softness, can random crooked folding, thin thickness, volume is little, connect the characteristics such as simple and convenient disassembly; This flexible base plate 10 be provided with one can arrange plural LED device 30 first surface 11 and one in flexible base plate 10 in addition side and on this first surface 11, sinter complex conduction circuit 20 into conducting resinl printing or coating with respect to second surface 12 (not shown) of this first surface 11.

Wherein, these conducting wires 20 are to be multiple containing metal and the nonmetal material that is composited through special formulation, and this metal material is such as silver, copper and palladium etc.

These plural LED device 30 are to be arranged on the first surface 11 with the array arrangement; and after being electrically connected with these conducting wires 20 respectively in the mode of silver slurry or the welding of other conductive material; coat a transparent adhesive tape in these plural LED device 30 outer surface of contact with flexible base plate 10 again and form a protective seam (not shown), with the set effect of effective increase LED device 30.

20 of these conducting wires respectively towards the surrounding edge of flexible base plate 10 with radial parallel side by side or interlace mode extend, and compile in this edge and to be connected to form plural conductive unit 21, by this, effectively reach the usefulness that is electrically connected and electric current is provided, wherein, these conducting wires 20 be have a nanoscale conducting resinl with screen painting after, through heating and baking is fixing forms or coat on the flexible base plate 10, form with high temperature sintering again.

See also Fig. 2, it is the front elevation for the first embodiment of the invention display screen, the present invention is with 20 printings of complex conduction circuit or coats on the first surface 11 of this flexible base plate 10, simultaneously will print control circuit 40 in the peripheral edge area of this first surface 11 is printed on the same plane or its back side, see through again through hole and will print control circuit 40 and conducting wire 20 electric connections, and after conductive unit 41 and these conducting wire 20 corresponding connections by this printing control circuit 40, again these plural LED device 30 are pasted on the first surface 11 that is arranged at flexible base plate 10, and with conductive unit 21 electrically connects of these conducting wires 20.

Be arranged at the printing control circuit 40 of flexible base plate 10 sides and SMD LED device 30 by this, effectively simplify the line configuring on these flexible base plate 10 surfaces, and utilize the deflection characteristic of this flexible base plate 10, it is bent curling to make the present invention have, and reaches the easily effect that is convenient for carrying, constructs.

Wherein, these complex conduction circuits 20 are visual actual user demands and the area that it distribute to extend is set, and can utilize multi-sheet printed mode, after increasing by an insulation course on original display layer that contains LED device 30 and conducting wire 20, directly overlap again and print another display layer, utilize the mode of multilayer perforation to reach electrically conducting between display layer, and by these printing control circuits 40 are directly printed the design that is arranged on the flexible base plate 10, can directly reach the connected mode of electrically connect, and the soft tabular design of flexible base plate 10, can in response to the display screen space requirement of various multi-form sizes, effectively reach the effect that usable floor area and elasticity are used.

See also Fig. 3 A and Fig. 3 B, be respectively the front elevation of second embodiment of the invention and the rear view of second embodiment of the invention, this printing control circuit 40 is directly its printing to be arranged on the second surface 12 of flexible base plate 10, and see through directly in the mode of perforation on the flexible base plate 10 and make the printing control circuit 40 of conducting wire 20 and second surface 12 on the first surface 11 be electrically connected, by this, effectively reach the effectiveness of the firm and circuit control of electrically connect, electric current.

Wherein, this printing control circuit 40 is surrounding edges that directly printing is arranged at flexible base plate 10, and directly contact binding with these complex conduction circuits 20, by these conducting wires 20 and control structure are arranged on this flexible base plate 10 jointly, not only effectively reach the function that links each conductive devices and the shortcoming of eliminating the hop situation, and see through the material characteristic of the deflection of flexible base plate 10, make the present invention applicable on the various bending structure faces.

See also Fig. 4, it is the partial enlarged drawing for second embodiment of the invention, printed on the second surface 12 that is arranged at flexible base plate 10 through printing control circuit 40, make it be relatively arranged on 20 back sides, conducting wire on the first surface 11, simplifying the line configuring on flexible base plate 10 surfaces, and can effectively increase single substrate and can be used in the surface area that LED device 30 is set.

See also Fig. 5 A and Fig. 5 B, be respectively enforcement view of the present invention and another enforcement view of the present invention, this enforcement state is the characteristic of utilizing these flexible base plate 10 flexibles, to reach these LED device 30 are arranged on the flexible base plate 10, link with complex conduction circuit 20 again, and after seeing through these conducting wires 20 and these printing control circuits 40 formation electrically connects, can directly this flexible base plate 10 be affixed on arbitrary plane or the concave-convex curved surface through the particular design of its back glue type.

See also Fig. 6 A and Fig. 6 B, be respectively the composition synoptic diagram of embodiments of the invention and the diagrammatic cross-section of embodiments of the invention, take the flexible base plate 10 of a fixed size as example, as want effectively to increase the saturation degree of its display brightness and color, connect a plurality of flexible base plates 10 to increase the display surface except seeing through, also can be by directly after most LED device 30 and complex conduction circuit 20 be set on the same flexible base plate 10, form one first display layer 101, and then after directly coating arranges an insulation course 22 on this first display layer 101, the mode of most LED device 30 being arranged with matrix overlaps and is arranged on this insulation course 22, overlapped in the mode of printing heat baking or coating sintering again conducting wire 20 is set, and with these LED device 30 electrically connects, form by this second display layer 102, mode according to this, visual actual user demand, after repeating to be coated with another insulation course 22 these LED device 30 and conducting wire 20 are set again, form the 3rd display layer 103, form perforate 23 by insulation course 22 perforation that will be coated with between this each display layer again, make conducting wire 20 conductings of each display layer and effectively reach electric connection, to form the display screen of a Multi-level display structure.

See also Fig. 7, it is the first embodiment synoptic diagram for light emitting diode of the present invention, the LED device 30 of present embodiment is the light emitting diode that can be SMD (Surface Mount Device) Surface Mount packing forms, the pedestal 31 of this LED device 30 directly is bonded on the first surface 11 of flexible base plate 10, after connecting respectively this LED device 30 with two

wiring

32,33 again, affixed in the mode of silver slurry or the welding of other conductive material with the conducting wire 20 of coating on the first surface 11 again, reach by this and electrically conduct.

See also Fig. 8; it is the second embodiment synoptic diagram for light emitting diode of the present invention; LED device 30 of the present invention also can be the light-emitting diodes nest of tubes chip of un-encapsulated; as shown in the figure; directly the pedestal 31 with this LED device 30 is bonded on the first surface 11 of flexible base plate 10; make two wiring 32 of this LED device 30; 33 directly form bindings with this conducting wire 20 after; one encapsulated layer 50 is set on first surface 11 again; be covered in LED device 30 and two wiring 32; on 33, reach by this effectiveness of packaging protection and electric connection.

See also Fig. 9, it is the 3rd embodiment synoptic diagram for light emitting diode of the present invention, this flexible base plate 10 is to be provided with a first surface 11 and a second surface 12, present embodiment is directly to be coated with to be laid with complex conduction circuit 20 on this second surface 12, and while direct adhesion on this second surface 12 arranges plural LED device 30, make two wiring 32 of these

LED device

30,33 directly with these complex conduction circuits 20 formation electrically connects and the light-emitting area of LED device 30 is arranged outwardly, to provide through flexible base plate 10 outside luminous effects, shown in the dotted line among the figure; In addition, more can be according to the combination of these plural LED device 30 with flexible base plate 10, directly the substrate with application surface replaces this flexible base plate 10, and these plural LED device 30 directly are arranged on the substrate of application surface.

See also Figure 10, it is the 4th embodiment synoptic diagram for light emitting diode of the present invention, respectively at the first surface 11 of flexible base plate 10 and second surface 12 a plurality of LED device 30 that are crisscross arranged, together seasonal these LED device 30 are transmitting illuminant in the same direction, and by with these LED device 30 with staggered connection set-up mode, it is more careful, bright effectively to reach the color displays that makes display screen of the present invention.

See also Figure 11, to be LED device synoptic diagram of the present invention, this LED device 30 is that the single chip LED device that can be a monochromatic single chip LED device that shows or multicolour demonstration forms, the present invention is that the single chip LED device that shows take multicolour is as example, it is comprised of with control circuit a single chip LED device 37, wherein, this single chip LED device 37 is by a red light-emitting diode chip unit 34, one blue LED chip unit 35 and a green light LED chip unit 36 and a special microchip integration and making form, by being integrated, these light-emitting diode chip for backlight unit unit form a single chip LED device 37, and be combined with the special microchip of this control circuit and form LED device 30, so that this LED device 30 forms a device that the multi-color light source can be provided.

Wherein, this special microchip has the control circuit that designs for the color displays that cooperates these Tricolor LED unit.

See also Figure 12, to be conspectus of the present invention, see through different user demands and these plural LED device 30 be set on flexible base plate 10, and arrange respectively these complex conduction circuits 20 with radial parallel side by side or interlace mode extend to compile to the surrounding edge of flexible base plate 10 and form plural conductive unit 21.

As from the foregoing, structure of the present invention has following practical advantage:

Function by the deflection of flexible base plate, and can be directly with screen painting or coating sintering complex conduction circuit and printing control circuit, not only can make flexible base plate extend according to actual needs and connect, further can provide the hop situation when preventing from connecting between circuit to produce.

See through the special substance design of this flexible base plate, produce seamless effect between flexible base plate and flexible base plate in being applied in to connect, present a closed state, the functional characteristic that arranges by the visual demand of its size, and reach and can adopt according to actual needs, little of vehicle window, office nameplate etc., greatly to the display screen of cylinder, signboard or the glass curtain exterior wall etc. in building.

Flexible material characteristic via this flexible base plate, and the stickup of back glue type design, make display screen of the present invention applicable to various planes or have the curved surface of radian, and can be directly with the mode of pasting firmly be arranged within the application surface, the outside, and effectively enlarge its scope of application and more simplify construction operation.

Through the printing heat baking of multiple field punched-type or the mode of coating sintering are printed on conducting wire and direct overlapping of printing control circuit on the flexible base plate, make light emitting diode soft board formula display screen of the present invention can present multi-color, and make the display light source of display screen more careful, bright.

In sum, flexible light emitting diode (LED) display screen of the present invention can effectively improve uses advertisement plate, the various shortcomings of placard or large-scale display board, it can utilize the special substance of flexible base plate, make this flexible base plate reach the extension binding and be arranged at different structural planes from assembling, and see through the set-up mode of back glue type flexible base plate, make this flexible light emitting diode (LED) display screen reach easy to assembly, effect easy to repair and circuit is simplified, and then make product of the present invention can reach more convenient, more practical, the institute that more meets the user must, really met the novelty that patented claim must possess, the important document of progressive and industry applications, the whence proposes patented claim in accordance with the law.

Only the above person only is preferred embodiment of the present invention, when not limiting scope of the invention process with this; So equivalence that Fan Yiben claim and description are done changes and modifies, all should still belong in the scope that patent of the present invention contains.

Claims

1. a flexible light emitting diode (LED) display screen is characterized in that, this display screen comprises:

One flexible base plate has a first surface that plural light emitting diode is set;

The plural number LED device is arranged on the described first surface with the array arrangement; And

Plural number is formed at conducting wire on the described flexible base plate by conducting resinl, and described conducting wire is to have the conducting resinl of nanoscale with screen painting, fixedly be formed on the described flexible base plate through heating and baking, and form with high temperature sintering, described these conducting wires are that the mode with silver slurry or the welding of other conductive material is electrically connected with described these LED device respectively; And

One printing control circuit is ora terminalis or the back side that directly printing is arranged at described flexible base plate, is used for the current signal of the light-emitting diode tube device on startup and the control flexible base plate; Wherein,

Described these LED device and conducting wire form a display layer, are to form the Multi-level display layer in the mode that can overlap.

2. flexible light emitting diode (LED) display screen as claimed in claim 1 is characterized in that, described flexible base plate is to can be a back glue type substrate.

3. flexible light emitting diode (LED) display screen as claimed in claim 1, it is characterized in that, described conducting resinl is allocated the composite that forms by the metal material of the special formulation of tool nanoscale and non-metallic material, and wherein, the metal material of described conducting resinl comprises palladium.

4. flexible light emitting diode (LED) display screen as claimed in claim 1 is characterized in that, is to be respectively equipped with an insulation course between described these display layers.